Gas-regulator



I (NoModeL) J.H.LUTH-ER.

GASBEGULATOR.

Patnted Teb, 13; 1883.

UNITED STATES PATENT OFFICE.

JAMES H. LUTHER, OF KARNES CITY, PENNSYLVANIA.

GAS-REGULATOR.

SPECIFICATION forming part of Letters Patert No. 272,282, dated February13, 1883. Application filed December 1882. (No model.)

v of Pennsylvania, have invented certain new and useful Inprovements inGas-Regulators; and I do hereby dcclare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters ofreference marked Y thereon, which form apart of this specification.

reduced upper portion, a'.

Figure l is a vertical Section of the device;

Fig. 2, a similar view of a modification.

' This invention relates to improvements in gas-regnlators or thosedevices designed to govern the supply of gas to the point ofconsumption; and it relates more especially to a device of this kindintended for use with boilers. In employing gas for fuel in boilers,particularly where the gas comes from the natural reservoir in theground, grave danger is liable if the flow is unimpeded. Not only maythe pressure be greater than is desired, and it usually is, but it' manyboilers are served from the same line in case some are shut off otherswill be under too great a pressure. The object of the present device isto govern the flow so that, no matter what its strength, the pressurecan be regulated to any desired degree.

The invention consists in the construction hereinafter set forth.

In the annexed drawings, the letter A indicates the cylinder orregulator-body, havingthe piston C, consisting of the nain portion,

or body c and the reduced portion' or stem c' the forner in the chambera, the latter in the This piston is furnished with a transverse passage,D, the Vertical axis of which is in the same plane with the verticalaxes of the ports B B'. Within the cylinder, below the piston, isplaced' a spring, E, between which' and the piston is a suitable,packing, e. This spring is held in by a cap, F, and its tension i sregulated by the plate and screw G. To the flange a at the top of` thecylinder is bolted the cap H, the 'upper part of the cylinder and theunder part of thecap being cnt away to form a recess, I. Within thisrecess is placed a diaphragn, K, of rubberor other flexible material.This diaphragm is secnred by its edge between the flange a y and cap H,and is held at its center to the top of the stern c' by the screw Ic,the under part of the cap H having the recess h to accommodate the headof the screw. This diaphragm K is made with a circular rib, k, and'within this rib a rigid plate, L, is secured to the diaphragm. The capH- is tapped and screwthreaded nt h' to receive the pipe h fI'Olll theboiler.

In use this regulator is located at the boiler, the pipe IL beingconnected thereto, so that the pressure on top of the'diaphragn is thesane as that in the boiler. The 'induction-portB is connected with thehigh-pressure supply-pipo and the ednction-port B' with boiler,cocksbeing placed in the pipes on each side of the regulator. The spring E isgiven the proper tension'to connterbalance the pressure which is desiredin the boiler, and the devic'e is ready for use. As the gas flows to theboiler the latter heats up, and the generatedstean, ex pandin g, passesinto the recess I above the`diaphragm K. As soon as the steam-pressure'equals the tension of the spring E the piston C Will be held in suchposition that the passage D will present just suflicient openings to theports to permit theproper flow ot' gas. If the pressure of the gasshould increase and the boiler become hotter, the stean-pressure wouldincrease, and,forcing the piston down against the spring, would tend toclose the ports by carrying the passage D farther down. This woulddiminish the supply `of gas and bring it back to the proper amount. Inthis way, as the pressure of the gas increases; the opening for itssupply gets smaller, and as the pressure diminishes the spring forcesthe piston up, allowing a greate'r flow, so that .the flow is keptconstant and at the'predetermined amount. As the steam operates on thediaphragnn, the 'ib G' in the diaphragm allows it to rise and fallwithout friction, the rib acting as a hin ge. The plate L, being rigid,equalizes the pressure and causes the diaphragm to rise and fall evenly.

With this device no packin g is needed IOG around the pisten above theports, for if any gas should pass np it would be stopped by thedizphragm.

In Fig. 2 is shown a modification of the deviee. In this the diaphragmis dispensed with and the steain adnitted through the eap H drectly ontop of the stem c' of thepiston G; or instead of on the top of the sternc' the stean may be admitted through a port, N, on the side of theeylinder and into the ehamber (t upon the body of the piston.

In either instanee the operation oi' the deviee is the same as thatdescribed in connection with the form shown in Fig. 1; In the form shownin Fig. 2 paehings n n'have to he used to make the piston gas-fight.

Having thus described my invention, what I claim is l. As agas-regulntor, the eylinder A, having the opposite ports, B B', at itssides and a steam-opening at or near one end, in eonbination with theinelosed pisten havingthetransverse pussageD in the sanevertieal planewith that of the ports B B', the piston elosely fitting the eylinder andthe stean-passage leading into the latter immediately above the piston,and the regulatingspring E, as set forth.

2. As a gas-regulator, the eylinder A, having the opposite ports, B B',at its sides and a stezun-opening at one end, and an inelosed pistenhaving the transverse passage D in the same vertical plane with that ol'the ports B B', in eombination with a diaphragm situated at one end ofthe eylinder, between the end of the piston and the stean-opening, allarrunged as and for the purpose set fortl.

In testimony that I elain the t'oregoing as my own I affix my signaturein presence ol" two GEO. F. GnAIIAM, WILL A. COULTER.

